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Analysis of Extracted and Retreated Root Canal Treatment Failures in a Nigerian University Teaching Hospital

机译：尼日利亚大学教学医院根管治疗的根管治疗失败分析

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The study evaluated the reasons for extraction and retreatment of failed endodontically treated teeth diagnosed within a period of three years in a University Teaching Hospital. Seventy one patients who attended the out-patient clinic with a diagnosis of endodontic failure and subsequent referral for extraction or retreatment. Information regarding the failed teeth was collected on a data form. Seventy one failures were analyzed. 45.7% from females and 54.9% males. Age range of 20 to 29 years had the highest number of failures. 50.7% were mandibular teeth while 49.3% accounted for the maxillary teeth. 91.5% were molars/bicuspids and 8.5% anteriors. 66.2% of the teeth were restored with amalgam and Jacket crowns had 2%. 47.7% failed within 6 months and 25.4% failed after 2 years. 57.7% had multiple visits while 42.3% had single visit. 74.6% of the failed therapies were performed by Resident doctors. Endodontic failures were 36.6% and 63.4% non endodontic. 57.7% of endodontic failures were maxillary teeth (57.7%) and 55.6% of non endodontic failures were mandibular teeth.73.1% of the endodontic failures occur in multiple visits while 51.1% of non endodontic failures occur in single visit. Radiographically, 50% of the endodontic failures were poorly filled. Failures were mainly molars restored with amalgam and substantially failed within 6 months. Most posterior endodontically treated teeth should be restored with crowns. Complex cases should be referred to specialists to reduce incidence of endodontic failures.
机译：该研究评估了在大学教学医院三年内诊断出的经牙髓治疗失败的牙齿的拔除和再治疗的原因。到门诊就诊的71位患者被诊断为牙髓衰竭，随后转诊进行拔牙或再次治疗。有关失败牙齿的信息收集在数据表上。分析了71个故障。女性占45.7％，男性占54.9％。失败次数最多的年龄是20至29岁。下颌牙占50.7％，上颌牙占49.3％。臼齿/双尖牙为91.5％，前牙为8.5％。 66.2％的牙齿用汞合金修复，夹克冠占2％。在6个月内失败了47.7％，在2年后失败了25.4％。多次访问的比例为57.7％，而单次访问的比例为42.3％。 74.6％的治疗失败是由住院医生进行的。牙髓衰竭的发生率为36.6％和63.4％为非牙髓。上颌牙的牙髓衰竭占57.7％（57.7％），下颌牙占55.6％，下颌牙占73.1％，而单次就诊的非牙髓衰竭占51.1％。影像学上，根管治疗失败的50％填充不良。失败的主要是使用汞合金修复的磨牙，并在6个月内彻底失败。大多数经牙髓治疗的后牙均应修复冠状。复杂的病例应转诊给专家，以减少牙髓衰竭的发生率。

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